93OImpact of tamoxifen (TAM) serum concentration on side effects among premenopausal patients (pts) with early breast cancer (BC) in the prospective multicenter CANTO cohort. (13th May 2019) - Ferreira, A R; Paci, A; Meglio, A Di; André, F; Everhard, S; Martin, A-L; Fasse, L; Menvielle, G; Vaz-Luis, I; Pistilli, B